Type-writing machine.



Tm: wnxmq'mcmnn. APPLICATION FILED APR. 80, 1909. r 930,73 1. Patented Aug. 10, 1909.

2 SHEETS-SHEET 1.

' stirrup STATES arena JOHNJOSEPH COOPER, OF LONDON, ENeLANnassmNon TO UNDERWOOD TYPEWRITER COMPANY, or NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

TYPE WRITING MACHINE.

Specification of Letters Patent.

Patented Aug. 10, 1909.

i To all whom it may concern:

Be it known that I, J onN JosEPHCooPna, a subject of the King of Great Britain, residing in the city of London, England, have invented certain new and useful Improvements in Type-VVriting Machines, of which the following is a specification. I

This invention relates to typewriting inachines which are especially constructed to; facilitate the writing of bills and simultaneously recording them in a manner cominonlydrnown as condensed charging.

Provisional application for Letters Patent in Great Britain on this invention was filed July 21, .1908, No. 15,441 of 1908, and complete specification was filed thereon J anua'ry' 21, 1909., y

.By means of the usual condensed billing attachment, the rotary platen of the typewriter, after one bill has been written and withdrawn may be given an idle backward rotation to an extent correspondin to the depth of the printed heading on the ill, and after the subsequent insertion of a fresh bill, the platen may be turned forwardly to bring it to position for writing the first line on the bil-l;-whereby the carbon copies of the successive bills are written in close order upon the longrecord sheet, which remains in the machine. This special backward and forward rotation of the platen is usually effected 1 by a crank, which rotates about the platen axis, playing between s tops provided upon the platen frame. The rotation of this crank is limited to a little less than an entire revolution; but in practice this is found suflicient for ordinary bill heads.

Where the depth of the printed portion of the billhead exceeds the circumference of theiplaten; and it is consequently necessary fortlief platen to turn backwardly more than an entire revolution at a single stroke, it has been] roposed to employ movement-multiplying-gearing between the crank and the platen, so that a stroke of the crank through less than an entire revolution will turn the platen through more than an entire revolution.

, One of the principal objects of the present invention is to provide simple and effective means for the rotation of the platen-driving crank itself through more'than an entire revolution at one stroke, so that it may be wheel.

connected directly to the platen, thus avoiding the necessity of employing earing; and to provide relatively adjustab e stops for limiting the throw of the crank.

In carrying out the present invention, a scroll guide is fixed to thd platen frame, and the stop is made adj usiable along said scroll guide for arresting the platen after the lat- .ter has turned through either more or less than an entire revolution at a single stroke. The scroll guide is in the form of a d sk fixed to the platen frame and having on one side a scroll; and the disk is perforated at intervals \to receive a releasable pin carried by the stop. By means of the pin the stop may be set at intervals agreeing with the pitch of the teeth of the usual line-space Upon the platen-driving crank is provided and is adapted to engage said stop, thereby to limit the initial stroke of the crank and platen. This arrest "of the platen occurs after it has turned through either less or more than an entire revolution, according to the position to which the'stop is adjusted along the scroll guide. 'Whcn the stop is adjusted "to a point on the inner portion of the scroll, said follower is enabled to pass freely by said step during the first revolution of the platen from inrtiiil position, and also during the return of the. platen to initial position.

The connection between the driving crank and platen is effected by means of a notched wheel fastened to the platen axle, an(l a movable dog carried by the crank. This dog is normally held outof engagement with the wheel, but may be moved into engage lnent therewith, and then held in such posilion during the rotation ofthe platen backwardly and forwardly by means of a circular guide which is provided on one side of the disk that constitutes the body of tlih scroll guide. Uponthe return of the plateh and crank to initial positions, a. spring snaps the dog out of engagement with the wheel and into a notch or. opening formed in said circular guide. To permit the dog to pass said notch or opening. when it is desired to turn the platen through more than an entire revolution, a latch is provided upon the crank or guide; and the latch is rendered effective by' means of the rotation of the crank, so that the dog is held in engage ment with the wheel and not allowed to reenter said opening in the circular guide until the crank returns to initial position.

Other features and advantages will hereinafter appear.

1n the accompanying drawings, Figure l is an end elevation of the platen frame and associated parts of an Underwood front strike writing machine, showing my iinproveinents applied thereto; the parts being shown in normal positions and the crank disconnected from the platen. big. 2 is a plan of the mechanism seen at Fig. l. Fig. 3 is a part-sectional plan, of the parts seen at lfig. 2; the section being taken along the line of Fig. 1. Fig. l is a sectional elevation taken along the line -l l of Fig. 2, but looking in the opposite direction from Fig. 1. liig. 5 is a view similar to Fig. l, but showing the driving crank connected to the platen. Fig. 6 is a fragmentary sec.- tional view of the platen-stop, taken along the line t o of Fig. a. Fig. i' is a pcrspec ti ve view of the link which is attached to the driving crank and carries at one end a scrollfolloover and at the other end a latch for holding the crank dog in ei'iga'gement with the platen wheel. Fig. 8 is a perspective view of the crank-dog and associated parts.

The scroll-guide above referred to is made by forming a scroll-groove 12 along one side of a disk 13, which is fixed to the platen frame l t (only one end of which is shown) of the typewriting machine. Said disk surrounds the axle to of the usual platen 15 tlaid axle is journaled in the platen frame ends i l, and carries on its projecting end the usual hand wheel l5". A follower it in the form of a pin .litting in the scrollgroove 12, is loosely connected to a crank,

the latter being provided with a handle 17 for rotating the platen. 'lhe crank turns freely about the platen axle 15, but is normally disconnected therefrom. The crank proper is designated as 18, said handle ll" being provided upon a slide (30) mounted on said crank. Said follower 16 projects from one end of a link 19, the other end of the latter being pivoted by means of a perforation 19 (Fig. 7) upon a stud 20, which projects from the crank 18 just outside'of the scroll guide 13; said guide being located between the link 19 and the crank 18, and the link having a long hub 19* fitting upon the stud 20. The link 19 stands about tangentially to the periphery at Fig. 4.

During the rotation of the platen by the crank, the follower l6 follows the scroll groove 12' until arrested by a stop, the latter adjustable along said scroll-groove to determine the length of stroke of the crank and platen. if the stroke is to be more than an of the disk 14 t) is a dog :32. i;

entiic revolution, the follower will, during the first revolution of the platen, pass freely by the stop; Said stop is carried on the end of a link 25, which is pivoted at one end at 26 to a short arm 2h". Said arm has a large hub 2T. freely rotatable upon a barrel 28, (Fig. 3) which is formed upon the sc oll disk 12 and threaded at its inner end to a head 2b, the latter having a central bearing for the axle l5, and fixed by a link 2h to the platen frame ll. The short arm :l'r' is seen at Figs. 2 and 3 divided into two parts. be tween which is confined a hub 2.3 of the link 2."). l'pon the other end of the link 2.") is carried a head or housing iii) to receive a pin 21) to lit in any of a series of holes formed in the body of the disk l l, that is, in the bottom of the scroll-groove 1;. at angular intervals agreeing with the pitch of the usual line-space wheel (not shown). The pin 21 is held in any of the holes by a. spring .23. Fig. 6, and may be withdrawn by a button :9. for ad ustment along the series ot holes,

which, it will be seen. constitute. a scroll-raok for tluwstop ll, which is provided upon the end of the link ill for enga .-nunt with the head of the follower 1t; to arrest the crank. 'lhe handle ll is shown mounted upon a slide 3t) movable along the crank,said slide having radial guide slots IStl". one of which tits upon the base of the stud 2t), and the other of which fits on a stud 30'', also lixcd in the outer end of the crank lb.

Extending from the inner end of the slide 3t), toward the sci'ollalisk l3, is a projection ll: and upon the opposite face of said slide drawspring 323. connected at one end to a stud 323* upon the slide 30, and at the other end to the stud 30". tends constantly to more the dog 23:! radially out- \trai'd or away from the platen axle L5: and the projection Ill on said dog is held by said spring normally in a notch or opening ill. (l ig. 5) provided in a circular guide 35, the opposite from the scroll-groove 12 'Xoriually the platen may be rotated freely in either direction by means of the usual thumb-wheel 15; but at any time the crank l5v may be connected with t to platen to control the same, by simply pressing the handle l? radially inward or toward the platen axle 15, thus carrying the dog 3; into engagement \viththe teeth of the notched wheel 36, which is lixed to the platen axle l5, and has the same number of teeth as the usual linespace wheel (not shown) This radial movementof the slide 230 carries the projection or stop 31 out of the notch 3t, so that the crank may now be freely rotated together with the wheel 36 and platen. The engagement of the dog 32 with the wheel as at first maintaincdby the circular guide 35. it will be understood that the rotation of the crank and platen continues until the engagement of latter formed on the face of the disk 13 H llitl 1 said huband-said disk. A lug4l3 is mountupon the inner end of thehub 19 (Fig. 7). This latch is out of use when the parts are to be snapped awa fifroin the wheel-by the turn freely Within the} disk. The hub 41 'of i the crank 18 may turn freely about the boss 7 39 upon which it is'mounted; said hub all being confined between the wheel 86 and the tion with a revoluble platen and a platen with the driver and platen, after the latter have turnedthrough more than an entire esoysr the follower it; or the end of the follower link 19) wi th the adjustable stop 24, as shown in dotted lines at Fig. 4';

In order to enable the opening 34 in the guide wall 35 to be passed without liability of the dog being snapped out of engagement with the-wlieel by the spring 33, there is provided a dog latch 37, which is formed in normal positions, as at'Fig. 1; but during; the inward swing of the link 19'to the position at Fig 5, caused b ;the follower 16 traversing the scroll gui e 12, the latch is swung to the: position at Fig. 5, above a lug 38 fixed upon the dog slide 30, so as to lock the dog against retraction from the wheel by the spring 33. Hence the dog can safely pass the opening 24, aiid-thus a positive drive of the platen through more than an entire revolution is permitted. Upon the re-. turn of the crank to normal position, the latch 37 again swin s,to inefiective position, thus releasing the clog 32 and permitting it sprin 33, when t e projection 31 arrives opposite the notch l i, so that the crank is detained in nvi t al position, as at Fig. 1.

It will'be-sieen' that a boss 39 is secured by a screw 41,] tipon the'plate'n axle between the wheel 36 and the head 28; the boss fitting the bore of i the'disk 13, a) permit the boss to disk 13, a washer 42 intervening between ed in a' scroll 12 at the innermost portion thereof to limit the adjustment of the stop 24; ,Variation's may be resorted to within the scope of the invention, and portions of the improvements may be used without others. Having thus described my invention, I claim: I

1. In a typewritin machine, the combination with a revolub e. platen and a platen frame, of a rotatable crank or driver, a f0llower connected, to said driver to rotate therewith, a fixed scroll guide for said follower, and a stop adjustable along said guide to coiiperate with said follower to arrest the crank and platen.

2. In a typewritin machine, the combine;

frame, of a rotatable crank or driver mount ed 'to ,turn about the platen axis, a follower loosely connected to said driver to rotate therewith, a scroll guide for said follower, and a stop to arrest said follower, together revolution at oneflstroke.

'3. 'In a typewritingmachme, the combination with a revoluble platen, of a rotatable d. In a typewriting machine, the combina-,

tlon with a revoluble platen, of a rotatable crank or driver, a scroll guide, a'link ivoted at one end to said driver and at the ot er end having a follower fitting in said scroll guide,

' and a stop adjustable along said scroll guide to engage said follower for'limiting the stroke of the driver to either more or less than an entire revolution, at will, saidscre ll guide carried by a disk, and the disk having perforations along the scroll to form a scroll rack,'and said stop having releasable means to engage the pertorations.

5. in a typewritmg machine, the combination with a revoluble platen,'of a rotata- 1 his crank or driver, a follower loosely connected to said driver, a fixed scroll guide for 'said follower, a rotatable arm, and a link pivoted at one end to said arm and carrying at the other-end a stop within said scroll :guide; a series of perforations being formed in the guide, and said stop having a releasable pin for engaging the perforations.

,6. in a typcwriting machine. the combination with a revoluble platen, of a rotatable crank or driver, a notched wheel connected to the platen, a dog carried by said driver, means normally holding the dog away from said wheel, means for engaging the dog with the wheel, and a latch upon the driver capable of holding the dog in engagement with the wheel.

7. In atypewriting machine, the combinationwith a revoluhlc platen, of a rotatable crank or driver, a notched wheel. connected to the platen, a dog carried by said .driver, a projection upon said dog, a circular guide to be engaged by said projection, to'holdsaid dog in engagement with said.-

wheel, said guide provided with a notch or opening, a spring to snap said projection into said notch and Withdraw the dog from the wheel, a latch upon said crank, and means dependent upon the rotation of the crank for moving said latch to hold the dog in engagement with the wheel, to enable the crank to turn the platen through more than an entire revolution at one stroke.

8; In a typewriting machine, the combination"with a revoluble platen, of a rotatablc crank or driver, a notched wheel connected to the platen, a. dog carried by said driver, means normally holding l'he dog away from said wheel, means for engaging the dog with thewheel, a 'projection upon said dog, a circular guide to engage said projection for holding the dog in engagement with the wheel, said guide having an opening, a spring to withdraw the dog from i ble erank or driver, a notched wheel con the wheel and cause said projection to occupy said opening. a link pivoted at one end upon said driver, a follower upon the other end ot said link. a scroll guide in which said 'l ollower tits, a latch upon said link caused by the swinging thereof to engage said dog to hold it in engagement with the notched wheel. and a stop adjustable along said scroll guide to engage said follower jtj'or arresting the driver and platen.

9. in a typewriting machine, the combination with a revoluble platen, of a platen driver rotatable about the axis of the platen, a volute rack, a stop adjustable along said rick. a cooperating stop member connected to said driver to rotate therewith, and means to cause the lastanentioned stop member to follow said rack during the rotation 01 the driver.

It). in a typewriting machine, the combination with a revoluble platen, of a platen driver rotatable about the axis of the platen, a stop member connected to said driver to rotate therewith, means to cause said stop member to follow a volute path during the rotation 01 the driver, and a fixed stop member arranged in said path to be engaged by the lirst stop member during the. second revolution of the driver in the same direction at one stroke.

11. In a typewritiug machine, the combination with a revoluble platen, of a platen driver rotatable about the axis of the platen, a stop member connected to said driver to rotate therewith. means to cause iid stop member to follow a voluie path during the. rotation ot' the driver, a lixed stop member arranged in said path to be engaged by the first stop member during the second revolutinn oi the driver in the same direction at. one stroke, said platen having a notched wheel, said driver having a pawl or dog normally disconnected from said wheel, and means to cause the dog to e112 go the wheel and maintain such t-sngagemeni. during more than an entire revolution ot' the platen at a single stroke.

12. In a typewritintg' machine, the combination with a revoluble platen. ot a rotatanected to the platen, a dog carried by said driver, means normally holding the .dog away from said wheel, means for engaging the dog with the wheel, a latch upon tho driver capable of holding the dog in engagement with the wheel, means to move said latch into efieetive position, and means for automatically releasing said latch upon the return of the driver to initial position.

In a typewriting machine, the combr nation with a revoluble platen, of a platen driver rotatable about the axis of the platen. a volute rack, a stop adjustable along said rack. a eoiipenatiiu, stop member connected to said driver to rotate, therewith, means to cause the last-mentioned stop member to t'ollow said rack during the' rotation of the driver, a notched wheel connected to the. platen. a dog carried by said driver, means norn'ially holding the dog away from said wheel. means for engaging the dogwith the wheel, a latch upon the driver capable ot holding the dog in engagement. with the wheel. means to more said latrh into etl'eetive position, and means tor autmnatically releasing," said latch upon the return of the. driver to initial position.

14-. In a typewritingmachine, the combination with a revoluble. platcn, ot? a platen driver rotatable about th? axis ot the platen. a volnt'e raek, a stop adjustable along said rack, a cooperating stop member connected to said driver to rotate therewith, means to cause the last-mentioned stop member to follow said rack during'the rotation ot the driver. a notched wheel connected to the platen. a do; carried by said driver, means normally holding the dog away from said wheel, means for engaging the dog wih the wheel, and means to maintain the engagement oi the. do; with the wheel during a rotation of the. driver through more than an entire revolution and back to initial position.

JOHN JOSEPH COOPER.

\Vitnesses 1 ll l). .llnznsox, R. F. \Vnaaans. 

